Skip to content
    Moz logo Menu open Menu close
    • Products
      • Moz Pro
      • Moz Pro Home
      • Moz Local
      • Moz Local Home
      • STAT
      • Moz API
      • Moz API Home
      • Compare SEO Products
      • Moz Data
    • Free SEO Tools
      • Domain Analysis
      • Keyword Explorer
      • Link Explorer
      • Competitive Research
      • MozBar
      • More Free SEO Tools
    • Learn SEO
      • Beginner's Guide to SEO
      • SEO Learning Center
      • Moz Academy
      • MozCon
      • Webinars, Whitepapers, & Guides
    • Blog
    • Why Moz
      • Digital Marketers
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • The Moz Story
      • New Releases
    • Log in
    • Log out
    • Products
      • Moz Pro

        Your all-in-one suite of SEO essentials.

      • Moz Local

        Raise your local SEO visibility with complete local SEO management.

      • STAT

        SERP tracking and analytics for enterprise SEO experts.

      • Moz API

        Power your SEO with our index of over 44 trillion links.

      • Compare SEO Products

        See which Moz SEO solution best meets your business needs.

      • Moz Data

        Power your SEO strategy & AI models with custom data solutions.

      Track AI Overviews in Keyword Research
      Moz Pro

      Track AI Overviews in Keyword Research

      Try it free!
    • Free SEO Tools
      • Domain Analysis

        Get top competitive SEO metrics like DA, top pages and more.

      • Keyword Explorer

        Find traffic-driving keywords with our 1.25 billion+ keyword index.

      • Link Explorer

        Explore over 40 trillion links for powerful backlink data.

      • Competitive Research

        Uncover valuable insights on your organic search competitors.

      • MozBar

        See top SEO metrics for free as you browse the web.

      • More Free SEO Tools

        Explore all the free SEO tools Moz has to offer.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • Learn SEO
      • Beginner's Guide to SEO

        The #1 most popular introduction to SEO, trusted by millions.

      • SEO Learning Center

        Broaden your knowledge with SEO resources for all skill levels.

      • On-Demand Webinars

        Learn modern SEO best practices from industry experts.

      • How-To Guides

        Step-by-step guides to search success from the authority on SEO.

      • Moz Academy

        Upskill and get certified with on-demand courses & certifications.

      • MozCon

        Save on Early Bird tickets and join us in London or New York City

      Unlock flexible pricing & new endpoints
      Moz API

      Unlock flexible pricing & new endpoints

      Find your plan
    • Blog
    • Why Moz
      • Digital Marketers

        Simplify SEO tasks to save time and grow your traffic.

      • Small Business Solutions

        Uncover insights to make smarter marketing decisions in less time.

      • Agency Solutions

        Earn & keep valuable clients with unparalleled data & insights.

      • Enterprise Solutions

        Gain a competitive edge in the ever-changing world of search.

      • The Moz Story

        Moz was the first & remains the most trusted SEO company.

      • New Releases

        Get the scoop on the latest and greatest from Moz.

      Surface actionable competitive intel
      New Feature

      Surface actionable competitive intel

      Learn More
    • Log in
      • Moz Pro
      • Moz Local
      • Moz Local Dashboard
      • Moz API
      • Moz API Dashboard
      • Moz Academy
    • Avatar
      • Moz Home
      • Notifications
      • Account & Billing
      • Manage Users
      • Community Profile
      • My Q&A
      • My Videos
      • Log Out

    The Moz Q&A Forum

    • Forum
    • Questions
    • Users
    • Ask the Community

    Welcome to the Q&A Forum

    Browse the forum for helpful insights and fresh discussions about all things SEO.

    1. Home
    2. SEO Tactics
    3. Intermediate & Advanced SEO
    4. The main navigation is using JS, will this have a negative impact on SEO?

    Moz Q&A is closed.

    After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.

    The main navigation is using JS, will this have a negative impact on SEO?

    Intermediate & Advanced SEO
    4
    5
    1515
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as question
    Log in to reply
    This topic has been deleted. Only users with question management privileges can see it.
    • Ty1986
      Ty1986 last edited by

      Hi mozzers,

      We just redesigned our homepage and discovered that our main nav is using JS and when disabling JS, no main nav links was showing up. Is this still considered bad practice for SEO? https://cl.ly/14ccf2509478

      thanks

      1 Reply Last reply Reply Quote 1
      • Ty1986
        Ty1986 @josellamazares last edited by

        Thanks Jose!

        1 Reply Last reply Reply Quote 0
        • josellamazares
          josellamazares last edited by

          Googlebot does not render JavaScript
          We hear very often about JavaScript rendering is the assumption that the crawler is responsible for the rendering. But that's not the case. The rendering is done by the indexer (from Google Caffeine).

          More specifically, the Web Rendering Service (WRS), which is part of Google Caffeine. And this is exactly where the second great difficulty lies in the area of JavaScript SEO.

          Gary Illyes says: "Also, to clarify, WRS is a subsystem of Caffeine, just like the PageRanker (cos yes, we still use it) or the canonicalization algorithm."

          The process flow between the crawler and the indexer:

          HTML files are downloaded.
          CSS and JavaScript data will be downloaded in parallel.
          WRS (Web Rendering Service) (part of Google Caffeine) is used to run JS.
          WRS renders all files.
          Now Google Caffeine can index the content if necessary.
          And that's when Googlebot can crawl new links.
          Why is that a problem? For the crawler to be able to enter the content and follow the links, it must first pass the data to the indexer. The indexer renders the content and returns it to the crawlers. Only now can the crawler see the content and follow the links. On the next page, the game starts again. Page by page. (many processes)

          Unlike conventional pages, where the crawler crawls numerous pages and, after crawling, passes everything collectively to the indexer. (few processes)

          This process presents another challenge to search engines.

          Regards

          Ty1986 1 Reply Last reply Reply Quote 1
          • jasongmcmahon
            jasongmcmahon last edited by

            The only bad SEO Practice regarding JS that I've of is trying to hide the JS files from Search Engines, apparently, Google needs to render a whole page as it indexing it; so blocking any JS (& CSS for that matter) isn't a good thing.

            1 Reply Last reply Reply Quote 0
            • Vijay-Gaur
              Vijay-Gaur last edited by

              Hi There,

              JS rendered UI isn't negative, it is however not a good practice also.

              You can find complete information to the concept of JS rendered pages and UI on this link, https://www.portent.com/blog/seo/javascript-bad-for-seo.htm .

              I hope this helps.

              Regards,

              Vijay

              1 Reply Last reply Reply Quote 1
              • 1 / 1
              • First post
                Last post

              Got a burning SEO question?

              Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.


              Start my free trial


              Browse Questions

              Explore more categories

              • Moz Tools

                Chat with the community about the Moz tools.

              • SEO Tactics

                Discuss the SEO process with fellow marketers

              • Community

                Discuss industry events, jobs, and news!

              • Digital Marketing

                Chat about tactics outside of SEO

              • Research & Trends

                Dive into research and trends in the search industry.

              • Support

                Connect on product support and feature requests.

              • See all categories

              Related Questions

              • Daaveey

                Default Wordpress 301 Redirects of JS and CSS files. Bad for SEO & How to Fix?

                Hi there: We are developers with some digital marketing expertise, but a current issue has us perplexed. An outside SEO firm has asked us to clean up a large number of 301 redirects. Most of these are 'default' Wordpress behavior that relate to calling the latest version of a JS or CSS file. For instance, a JS file is called with this: https://websitexyz.com/wp-includes/js/wp-embed.min.js?ver=4.9.1 but ultimately redirects to this: https://websitexyz.com/wp-includes/js/wp-embed.min.js. We are being asked to prevent the redirect from happening by, presumably, calling the ultimate file to begin with. The issue is that, as far as we know, there's no easy way to alter WP behavior to call the ultimate file to begin with. Does anyone have any thoughts on this? Thanks.

                Intermediate & Advanced SEO | | Daaveey
                0
              • viatrading1

                Merging Pages and SEO

                Hi, We are redesigning our website the following way: Before: Page A with Content A, Page B with Content B, Page C with Content C, etc
                e.g. one page for each Customer Returns, Overstocks, Master Case, etc
                Now: Page D with content A + B + C etc.
                e.g. one long page containing all Product Conditions, one after the other So we are merging multiples pages into one.
                What is the best way to do so, so we don't lose traffic? (or we lose the minimum possible) e.g. should we 301 Redirect A/B/C to D...?
                Is it likely that we lose significant traffic with this change? Thank you,

                Intermediate & Advanced SEO | | viatrading1
                0
              • Zanox

                If a website Uses <select>to dropdown some choices, will Google see every option as Content Or Hyperlink?</select>

                If a website Uses <select>  to dropdown some choices, will Google see every option as Content Or Hyperlink?</select>

                Intermediate & Advanced SEO | | Zanox
                0
              • Kingalan1

                Is Using a Question, Answer Format Appropriate for a Blog? Is a 300 Word Micro Blog An SEO Plus?

                My PR agency has suggested a question answer format be incorporated in my blog. They suggest a microblog with a single sentence question and an answer of about 300 words. My blog currently has about 35 posts. I would like to ramp up blog entries to about one or two per week of these "mini blog" posts. The format of the new blog begins as a question with the responses being paragraphs that do not use headings. My concerns are as follows: 1. No headings in an answer of 300 words will fail to provide Google with context regarding the content's meaning. Everything I have read about SEO suggests text be broken up in short sections and that it be divided by headings (preferably H2s). I very much like my agency's concept for a question answer format blog. It provides very practical info for visitors. How can I use it in a manner that supports SEO best practices? 2. According to a reputable SEO firm that has been assisting me, Google does not consider a blog post of less than 600 words to be superior quality. They told me that  blog posts of 300 words, from an SEO purpose will not be a great helpful, that the content will not be rich enough to generate incoming links. Is this really the case? What if this abbreviated content is very well written and engaging? If so, is 300 words sufficient? From the visitor's perspective I am not sure they would have the patience to read 600 words when 300 words is more than than enough to answer these basic questions. From a PR perspective I think the shorter content in a question answer format is superior at least for my line of business (commercial real estate brokerage). 3. If 500-600 words is the minimum word count, and headings are necessary, what is the best way to execute a question and answer blog format? The purpose of this blog is to provide very useful info to my visitors while generating incoming links to that will boast my rankings. Thanks in advance for your feedback!!! Alan

                Intermediate & Advanced SEO | | Kingalan1
                0
              • Webdeal

                How Google Adwords Can Impact SEO Ranking ?

                Hi SEO Gurus, I have a question. How Google Adwords Can Impact SEO Ranking ?
                Positive , negative or neutral impact? I will appreciate if you will provide detailed answer Thank you for your time webdeal

                Intermediate & Advanced SEO | | Webdeal
                0
              • RichBestSEO

                Is there any negative SEO effect of having comma's in URL's?

                Hello, I have a client who has a large ecommerce website. Some category names have been created with comma's in - which has meant that their software has automatically generated URL's with comma's in for every page that comes beneath the category in the site hierarchy. eg. 1 : http://shop.deliaonline.com/store/music,-dvd-and-games/dvds-and-blu_rays/ eg. 2 : http://shop.deliaonline.com/store/music,-dvd-and-games/dvds-and-blu_rays/action-and-adventure/ etc... I know that URL's with comma's in look a bit ugly! But is there 'any' SEO reason why URL's with comma's in are any less effective? Kind Regs, RB

                Intermediate & Advanced SEO | | RichBestSEO
                0
              • VividLime

                Link Age as SEO factor?

                Hi Guys
                I have a client who ranks well within a competitive sector of the travel industry. They are planning CMS move which will involve changing from .cfm to .aspx We will be doing the standard redirects etc However Matt's statement here on 301 redirects got me thinking
                http://www.youtube.com/watch?v=zW5UL3lzBOA&t=0m24s He says that basically you loose a bit of page rank when you do a 301 redirect. Now, we will be potentially redirecting 1000s of links and my thinking is 'a lot of a little, adds up to a lot'  In other words, 1000s of redirects may have a big enough impact to loose some rankings in a very competitive and aggressive space. So recommended that we contact the sites who has the link highest value and ask them to manually change the links from cfm to aspx. This will then mean that there are no loss value as with a 301 redirect. -But now I have another dilemma which I'm unsure about. So the main question:
                Is link age factor in rankings ? If I  update any links, this will make said link new to Google, so if link age is a factor, would this also lessen the value passed initially?

                Intermediate & Advanced SEO | | VividLime
                0
              • scanlin

                Does capitalization matter for SEO?

                Two places capitalization comes into play: (1) on-page use (title, h1, body text, img alt text, etc) (2) external anchor text I didn't think it mattered from Google's point of view for on-page usage (is this correct?) but I notice that OpenSiteExplorer' s 'anchor text distribution' tab shows different counts for the same keyword if it's capitalized in different ways (eg seomoz.org is listed separate from SEOmoz.org). Is that just OSE or does Google treat the keyword/phrase different based on its capitalization, too? And if so, then should I be creating external links to my site with the 'regular' and 'Capitalized' versions of my key phrases?

                Intermediate & Advanced SEO | | scanlin
                1

              Get started with Moz Pro!

              Unlock the power of advanced SEO tools and data-driven insights.

              Start my free trial
              Products
              • Moz Pro
              • Moz Local
              • Moz API
              • Moz Data
              • STAT
              • Product Updates
              Moz Solutions
              • SMB Solutions
              • Agency Solutions
              • Enterprise Solutions
              • Digital Marketers
              Free SEO Tools
              • Domain Authority Checker
              • Link Explorer
              • Keyword Explorer
              • Competitive Research
              • Brand Authority Checker
              • Local Citation Checker
              • MozBar Extension
              • MozCast
              Resources
              • Blog
              • SEO Learning Center
              • Help Hub
              • Beginner's Guide to SEO
              • How-to Guides
              • Moz Academy
              • API Docs
              About Moz
              • About
              • Team
              • Careers
              • Contact
              Why Moz
              • Case Studies
              • Testimonials
              Get Involved
              • Become an Affiliate
              • MozCon
              • Webinars
              • Practical Marketer Series
              • MozPod
              Connect with us

              Contact the Help team

              Join our newsletter
              Moz logo
              © 2021 - 2025 SEOMoz, Inc., a Ziff Davis company. All rights reserved. Moz is a registered trademark of SEOMoz, Inc.
              • Accessibility
              • Terms of Use
              • Privacy

              Looks like your connection to Moz was lost, please wait while we try to reconnect.